<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="js/jquery.js"></script>
	</head>
	<body>
		<textarea  cols="50" rows="20" id="TEXT"></textarea>
<input type="submit"  id="button" value="插入字符">
	</body>
</html>
<script type="text/javascript">
        $(document).ready(function (e) {
            $("#button").click(function () {
            	
            });
        });
    </script>